books.google.com.au - Rene Descartes was a highly influential philosopher, mathematician, and scientist and is regarded as the Father of modern philosophy and mathematics. This is the biography of Descartes, and it describes the life of Descartes, in the flesh and blood, rather than a technical analysis of his philosophical,...http://books.google.com.au/books/about/Cogito_Ergo_Sum.html?id=IRvIQkLFD60C&utm_source=gb-gplus-shareCogito, Ergo Sum